Vent to vessels holding liquids



(Modem,

. I .J. A. WRIGHT. Vents to Vessels Holdip g Liquid-s;

No. 228,159. Patented May 25,1880;

RFEIERS, PHDTO-LITNDGRKPHEI. WASHINGTON. D C

UNITED STATES PATENT OFFICE.

JQHN A. WRIGHT, OF KEENE, NEW HAMPSHIRE.

-VENT TO VESSELS HOLDING LIQUIDS.

SPECIFICATION forming part of Letters Patent No. 228,159, dated May 25, 1880.

' Application filed April 2, 1880. (ModeL) To all whom it may concern:

Be it known that I, JOHN A. WRIGHT, a citizen of the United States, residing at Keene, in the county of Cheshire and State of New Hampshire, have invented certain new and useful Improvements in Vents to Vessels Holding Liquids; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Myinvention consists of a metal nut provided with a hollow screw-plug having a small hole at right angles to its axis and extending into the hollow. V

The object of my invention is to provide a vessel for holding oil or other liquids with an air-vent which shall be perfectly tight while the can or vessel is being transported, and is more particularly applicable to. cans or vessels made of tin or other metal, but might be applied to packages of wood (such as barrels) of any form or dimensions.

In the accompanying drawings, in which similar letters of reference indicate like parts, Figure 1 is a side elevation of the can A, having a portion of one of its sides broken away, and showing a vertical section of thedevice partly unscrewed, so as to allow of the inlet of air to the inside of the can A through the hollow screw O and hole a; Fig. 2, an end elevation of the can A, showing the device 0 screwed down to its seat. Fig.3 is an enlarged detailed side elevation of the vent-cap, showing the lower portion in section.

0 is the head of the screw, provided with a milled edge. B is the nut, which is intended to be soldered to the can or otherwise fastened to the vessel containing liquid. The screw 0 is hollow from the bottom and as far as the hole a, which penetrates the hollow at right angles to the axis of the screw, thus forming a free passage for the air to the inside of the can when the hole a is above the top; of the nut B.

In order to utilize this invention, the nut B, with hollow screw 0 inserted and turned up tight to the shoulder of the cap or nut B, is soldered or otherwise attached to the can or package in some convenient place for venting which will not interfere with shipping. When it is desired to use the vent the hollow screw (3 is removed, and a brad-awl or other sharp instrument is inserted in the orifice in the nut B, from which the screw has been removed, and the can or package is punctured. hollow screw 0 is then replaced and turned up tight to the shoulder of the nut B. When it is desired to vent the can or package, turn the hollow screw to the left until the small orifice (till the screw 0 is brought above the shoulder of the nut B. 'This admits the air through the hollow screw 0 to the can or package sufficient to vent it an d enable the contents to flow freely through the nozzleor spigot. By turning the hollow screw 0 to the right until the orifice a is brought below the shoulder of the nut B the can is again tight, as far'as the vent is concerned.

This vent is very desirable to use in lampfillers, and can be made of any desired size for the purpose for which it is intended to be used.

What I claim is- In combination with an unpunctured. portion of a can, A, the hollow screw-plug G, provided with orifice a and screw-nut B, as and for the purposes set forth.

In testimony whereof I affix my signaturein presence of two witnesses.

JOHN A. WRIGHT.

Witnesses HIRAM BLAKE, T. B. EAMES.

The 

